QUOTE(silent_stalker @ Apr 24 2013, 09:59 PM)
Nope, turned off. When I 1st got this phone, the battery drain only 6-10% overnight. Now almost 20%. As some forumers point out there maybe a prob with charger, i checked the charging current is 999 n max 1000,so no prob there. So i googled around and found many have the same prob, not just s3 users. Something got to do with android os. The media server wakelock has no definite solution.

do below to check..
1. You may download batterbatterystate to find out what causing your phone restless, I remember I ask you before.
2. Otherwise go to Applications manager -> Under download, force close stop all apps, don't worry you still can use the aps even you force stop it.
If you use step 1 this apps will tell you what apps is actively running.
If you use step 2 you will not able to determine which is the culprit but you battery will back to normal.
For me my battery will drain most 2% and most of the time is 1%.